X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/2d0dc9298e36bb9c010ede2c42db16e3ab00da79..d12746bc15d83ab821be36975da0179672708bc1:/src/src/host.c

diff --git a/src/src/host.c b/src/src/host.c
index fbc46575d..c3694c047 100644
--- a/src/src/host.c
+++ b/src/src/host.c
@@ -84,7 +84,7 @@ if (limit < 1)
   return 0;
 if (random_seed == 0)
   {
-  if (running_in_test_harness) random_seed = 42; else
+  if (f.running_in_test_harness) random_seed = 42; else
     {
     int p = (int)getpid();
     random_seed = (int)time(NULL) ^ ((p << 16) | p);
@@ -520,7 +520,9 @@ There wouldn't be two different variables if I had got all this right in the
 first place.
 
 Because this data may survive over more than one incoming SMTP message, it has
-to be in permanent store.
+to be in permanent store.  However, STARTTLS has to be forgotten and redone
+on a multi-message conn, so this will be called once per message then.  Hence
+we use malloc, so we can free.
 
 Arguments:  none
 Returns:    nothing
@@ -530,13 +532,12 @@ void
 host_build_sender_fullhost(void)
 {
 BOOL show_helo = TRUE;
-uschar *address;
+uschar * address, * fullhost, * rcvhost, * reset_point;
 int len;
-int old_pool = store_pool;
 
 if (!sender_host_address) return;
 
-store_pool = POOL_PERM;
+reset_point = store_get(0);
 
 /* Set up address, with or without the port. After discussion, it seems that
 the only format that doesn't cause trouble is [aaaa]:pppp. However, we can't
@@ -593,7 +594,7 @@ if (!sender_host_name)
   int adlen;    /* Sun compiler doesn't like ++ in initializers */
 
   adlen = portptr ? (++portptr - address) : Ustrlen(address);
-  sender_fullhost = sender_helo_name
+  fullhost = sender_helo_name
     ? string_sprintf("(%s) %s", sender_helo_name, address)
     : address;
 
@@ -619,12 +620,7 @@ if (!sender_host_name)
     g = string_catn(g, US")", 1);
     }
 
-  sender_rcvhost = string_from_gstring(g);
-
-  /* Release store, because string_cat allocated a minimum of 100 bytes that
-  are rarely completely used. */
-
-  store_reset(sender_rcvhost + g->ptr + 1);
+  rcvhost = string_from_gstring(g);
   }
 
 /* Host name is known and verified. Unless we've already found that the HELO
@@ -637,25 +633,30 @@ else
 
   if (show_helo)
     {
-    sender_fullhost = string_sprintf("%s (%s) %s", sender_host_name,
+    fullhost = string_sprintf("%s (%s) %s", sender_host_name,
       sender_helo_name, address);
-    sender_rcvhost = (sender_ident == NULL)?
-      string_sprintf("%s (%s helo=%s)", sender_host_name,
-        address, sender_helo_name) :
-      string_sprintf("%s\n\t(%s helo=%s ident=%s)", sender_host_name,
-        address, sender_helo_name, sender_ident);
+    rcvhost = sender_ident
+      ?  string_sprintf("%s\n\t(%s helo=%s ident=%s)", sender_host_name,
+        address, sender_helo_name, sender_ident)
+      : string_sprintf("%s (%s helo=%s)", sender_host_name,
+        address, sender_helo_name);
     }
   else
     {
-    sender_fullhost = string_sprintf("%s %s", sender_host_name, address);
-    sender_rcvhost = (sender_ident == NULL)?
-      string_sprintf("%s (%s)", sender_host_name, address) :
-      string_sprintf("%s (%s ident=%s)", sender_host_name, address,
-        sender_ident);
+    fullhost = string_sprintf("%s %s", sender_host_name, address);
+    rcvhost = sender_ident
+      ?  string_sprintf("%s (%s ident=%s)", sender_host_name, address,
+        sender_ident)
+      : string_sprintf("%s (%s)", sender_host_name, address);
     }
   }
 
-store_pool = old_pool;
+if (sender_fullhost) store_free(sender_fullhost);
+sender_fullhost = string_copy_malloc(fullhost);
+if (sender_rcvhost) store_free(sender_rcvhost);
+sender_rcvhost = string_copy_malloc(rcvhost);
+
+store_reset(reset_point);
 
 DEBUG(D_host_lookup) debug_printf("sender_fullhost = %s\n", sender_fullhost);
 DEBUG(D_host_lookup) debug_printf("sender_rcvhost = %s\n", sender_rcvhost);
@@ -1673,7 +1674,7 @@ HDEBUG(D_host_lookup)
 /* For testing the case when a lookup does not complete, we have a special
 reserved IP address. */
 
-if (running_in_test_harness &&
+if (f.running_in_test_harness &&
     Ustrcmp(sender_host_address, "99.99.99.99") == 0)
   {
   HDEBUG(D_host_lookup)
@@ -1795,9 +1796,9 @@ while ((ordername = string_nextinlist(&list, &sep, buffer, sizeof(buffer))))
 /* If we have failed to find a name, return FAIL and log when required.
 NB host_lookup_msg must be in permanent store.  */
 
-if (sender_host_name == NULL)
+if (!sender_host_name)
   {
-  if (host_checking || !log_testing_mode)
+  if (host_checking || !f.log_testing_mode)
     log_write(L_host_lookup_failed, LOG_MAIN, "no host name found for IP "
       "address %s", sender_host_address);
   host_lookup_msg = US" (failed to find host name from IP address)";
@@ -1831,15 +1832,9 @@ for (hname = sender_host_name; hname; hname = *aliases++)
   {
   int rc;
   BOOL ok = FALSE;
-  host_item h;
-  dnssec_domains d;
-
-  h.next = NULL;
-  h.name = hname;
-  h.mx = MX_NONE;
-  h.address = NULL;
-  d.request = sender_host_dnssec ? US"*" : NULL;;
-  d.require = NULL;
+  host_item h = { .next = NULL, .name = hname, .mx = MX_NONE, .address = NULL };
+  dnssec_domains d =
+    { .request = sender_host_dnssec ? US"*" : NULL, .require = NULL };
 
   if (  (rc = host_find_bydns(&h, NULL, HOST_FIND_BY_A | HOST_FIND_BY_AAAA,
 	  NULL, NULL, NULL, &d, NULL, NULL)) == HOST_FOUND
@@ -2010,7 +2005,7 @@ lookups here (except when testing standalone). */
 /* Initialize the flag that gets set for DNS syntax check errors, so that the
 interface to this function can be similar to host_find_bydns. */
 
-host_find_failed_syntax = FALSE;
+f.host_find_failed_syntax = FALSE;
 
 /* Loop to look up both kinds of address in an IPv6 world */
 
@@ -2032,7 +2027,7 @@ for (i = 1; i <= times;
   if (slow_lookup_log) time_msec = get_time_in_ms();
 
   #if HAVE_IPV6
-  if (running_in_test_harness)
+  if (f.running_in_test_harness)
     hostdata = host_fake_gethostbyname(host->name, af, &error_num);
   else
     {
@@ -2045,7 +2040,7 @@ for (i = 1; i <= times;
     }
 
   #else    /* not HAVE_IPV6 */
-  if (running_in_test_harness)
+  if (f.running_in_test_harness)
     hostdata = host_fake_gethostbyname(host->name, AF_INET, &error_num);
   else
     {
@@ -2170,7 +2165,7 @@ if (host->address == NULL)
 
   HDEBUG(D_host_lookup) debug_printf("%s\n", msg);
   if (temp_error) goto RETURN_AGAIN;
-  if (host_checking || !log_testing_mode)
+  if (host_checking || !f.log_testing_mode)
     log_write(L_host_lookup_failed, LOG_MAIN, "%s", msg);
   return HOST_FIND_FAILED;
   }
@@ -2591,20 +2586,21 @@ if (fully_qualified_name != NULL) *fully_qualified_name = host->name;
 dns_init((whichrrs & HOST_FIND_QUALIFY_SINGLE) != 0,
          (whichrrs & HOST_FIND_SEARCH_PARENTS) != 0,
 	 dnssec_request);
-host_find_failed_syntax = FALSE;
+f.host_find_failed_syntax = FALSE;
 
 /* First, if requested, look for SRV records. The service name is given; we
 assume TCP protocol. DNS domain names are constrained to a maximum of 256
 characters, so the code below should be safe. */
 
-if ((whichrrs & HOST_FIND_BY_SRV) != 0)
+if (whichrrs & HOST_FIND_BY_SRV)
   {
-  uschar buffer[300];
-  uschar *temp_fully_qualified_name = buffer;
+  gstring * g;
+  uschar * temp_fully_qualified_name;
   int prefix_length;
 
-  (void)sprintf(CS buffer, "_%s._tcp.%n%.256s", srv_service, &prefix_length,
-    host->name);
+  g = string_fmt_append(NULL, "_%s._tcp.%n%.256s",
+	srv_service, &prefix_length, host->name);
+  temp_fully_qualified_name = string_from_gstring(g);
   ind_type = T_SRV;
 
   /* Search for SRV records. If the fully qualified name is different to
@@ -2613,7 +2609,8 @@ if ((whichrrs & HOST_FIND_BY_SRV) != 0)
 
   dnssec = DS_UNK;
   lookup_dnssec_authenticated = NULL;
-  rc = dns_lookup_timerwrap(&dnsa, buffer, ind_type, CUSS &temp_fully_qualified_name);
+  rc = dns_lookup_timerwrap(&dnsa, temp_fully_qualified_name, ind_type,
+	CUSS &temp_fully_qualified_name);
 
   DEBUG(D_dns)
     if ((dnssec_request || dnssec_require)
@@ -2629,7 +2626,7 @@ if ((whichrrs & HOST_FIND_BY_SRV) != 0)
       { dnssec = DS_NO; lookup_dnssec_authenticated = US"no"; }
     }
 
-  if (temp_fully_qualified_name != buffer && fully_qualified_name != NULL)
+  if (temp_fully_qualified_name != g->s && fully_qualified_name != NULL)
     *fully_qualified_name = temp_fully_qualified_name + prefix_length;
 
   /* On DNS failures, we give the "try again" error unless the domain is
@@ -2858,7 +2855,7 @@ for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
   block. Otherwise, add a new block in the correct place; if it has to be
   before the first block, copy the first block's data to a new second block. */
 
-  if (last == NULL)
+  if (!last)
     {
     host->name = string_copy_dnsdomain(data);
     host->address = NULL;
@@ -3267,7 +3264,7 @@ while (Ufgets(buffer, 256, stdin) != NULL)
   else if (Ustrcmp(buffer, "require_dnssec")    == 0) require_dnssec = TRUE;
   else if (Ustrcmp(buffer, "no_require_dnssec") == 0) require_dnssec = FALSE;
   else if (Ustrcmp(buffer, "test_harness") == 0)
-    running_in_test_harness = !running_in_test_harness;
+    f.running_in_test_harness = !f.running_in_test_harness;
   else if (Ustrcmp(buffer, "ipv6") == 0) disable_ipv6 = !disable_ipv6;
   else if (Ustrcmp(buffer, "res_debug") == 0)
     {